Effect of pollen consumption on development and intraguild predation of two predatory Coccinellidae

IF 1.1 3区 农林科学 Q3 ENTOMOLOGY Journal of Asia-pacific Entomology Pub Date : 2024-09-07 DOI:10.1016/j.aspen.2024.102320
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Abstract

Many omnivorous predaceous coccinellids consume both pests like aphids and a range of plant-derived foods including pollen. It is critical to understand how plant-derived food like pollen could affect the fitness and interspecific interactions of predaceous coccinellids. This study investigated the effect of pollen consumption on the development, reproduction and intraguild predation (IGP) of two naturally co-existing aphidophagous ladybirds, Harmonia axyridis and Propylea japonica. Both species were provided with three diets including a moist canola pollen, the aphid Myzus persicae, or moist canola pollen together with aphids. The 1st instar larval of both H. axyridis and P. japonica could not survive and develop to the next larval stage when supplied with water alone. When fed on pollen only, 53 % of the H. axyridis larvae and 25 % of the P. japonica larvae successfully developed to adult. Both species exhibited an elongated development time, shorter larval body length and lower adult body weight than when offered with aphids and the mixed diet. In addition, P. japonica could not reproduce when fed on pollen alone. Interestingly, when pollen was provided as additional food, the overall IGP between larvae of H. axyridis and P. japonica was significantly reduced compared with water control or aphid as food alone. The results of this study indicated that pollen not only supports the survival of H. axyridis and P. japonica when prey is scarce, but also could benefit the co-existence of these species. For future study, it is necessary to investigate how pollinivory could benefit the fitness and biological control potential of H. axyridis and P. japonica under field conditions.

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花粉消耗对两种食肉蝇科昆虫的发育和群内捕食的影响
许多杂食性肉食茧蜂既吃蚜虫等害虫,也吃包括花粉在内的一系列植物衍生食物。了解花粉等植物衍生食物如何影响肉食性茧丝虫的适应性和种间相互作用至关重要。本研究调查了食用花粉对两种自然共存的食蚜瓢虫(Harmonia axyridis和Propylea japonica)的发育、繁殖和种内捕食(IGP)的影响。为这两种瓢虫提供了三种食物,包括潮湿的油菜花粉、蚜虫Myzus persicae或潮湿的油菜花粉和蚜虫。如果只给 H. axyridis 和 P. japonica 喂水,它们的 1龄幼虫都无法存活并发育到下一个幼虫阶段。只喂花粉时,53% 的 H. axyridis 幼虫和 25% 的 P. japonica 幼虫能成功发育成成虫。与喂食蚜虫和混合饲料相比,这两种害虫的发育时间延长,幼虫体长缩短,成虫体重降低。此外,仅喂食花粉时,P. japonica 无法繁殖。有趣的是,当提供花粉作为额外食物时,与水对照或仅以蚜虫作为食物相比,H. axyridis 和 P. japonica 幼虫之间的总体 IGP 显著降低。本研究结果表明,当猎物稀少时,花粉不仅能支持蚜蝇幼虫的生存,还能促进这些物种的共存。在今后的研究中,有必要探讨在野外条件下,食粉如何有利于 H. axyridis 和 P. japonica 的适应性和生物防治潜力。
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来源期刊
Journal of Asia-pacific Entomology
Journal of Asia-pacific Entomology Agricultural and Biological Sciences-Insect Science
CiteScore
2.70
自引率
6.70%
发文量
152
审稿时长
69 days
期刊介绍: The journal publishes original research papers, review articles and short communications in the basic and applied area concerning insects, mites or other arthropods and nematodes of economic importance in agriculture, forestry, industry, human and animal health, and natural resource and environment management, and is the official journal of the Korean Society of Applied Entomology and the Taiwan Entomological Society.
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